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A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland

文献类型：期刊论文

作者Zhou, Jian2; Chen, Shiping3; Yan, Liming2; Wang, Jing2; Jiang, Ming2; Liang, Junyi4; Zhang, Xuanze5; Xia, Jianyang2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2021
卷号126期号:5
关键词heterotrophic respiration nonlinear process rain pulse effect soil carbon cycle model soil microbial model soil moisture
ISSN号2169-8953
DOI10.1029/2020JG006120
文献子类Article
英文摘要As a critical process in regulating terrestrial feedback to climate change, soil heterotrophic respiration is commonly simulated with the first-order kinetics in current Earth system models. Compared with the first-order kinetic models, explicit microbial models are expected to better simulate nonlinear carbon (C)-cycle phenomena, such as the pulse dynamics of soil heterotrophic respiration driven by dry-rewetting cycles in grasslands. However, these two types of models (i.e., linear conventional and nonlinear microbial models) have never been compared based on in situ observations of soil heterotrophic respiration in the semi-arid grassland, which is significantly affected by the dry-rewetting events. Here, based on the field data of soil heterotrophic respiration in a semi-arid grassland in northern China, we first showed that the shift from a conventional linear model to a nonlinear microbial model did not substantially improve the simulation of soil heterotrophic respiration. Then, we quantified the contributions of different moisture-response functions to the uncertainty in simulating the soil C dynamics. The results showed that the selection of moisture-response functions combined with parameterization in the soil C models dominated the modeled uncertainties in soil heterotrophic respiration. These findings suggest that both the conventional linear model and nonlinear microbial model can simulate well the pulse dynamic of soil heterotrophic respiration in grasslands with an improved parameterization of water regulation on soil carbon decomposition. This study also calls for more observations of nonlinear C phenomena for reducing the simulation uncertainty on soil C cycling in Earth system models.
学科主题Environmental Sciences ; Geosciences, Multidisciplinary
出版地WASHINGTON
电子版国际标准刊号2169-8961
WOS关键词EARTH SYSTEM ; QUANTIFYING UNCERTAINTIES ; CARBON RESPONSES ; ECOSYSTEM MODEL ; ELEVATED CO2 ; GLOBAL-MODEL ; MOISTURE ; NITROGEN ; DECOMPOSITION ; TEMPERATURE
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000655232300022
出版者AMER GEOPHYSICAL UNION
资助机构National Key Research and Development Program of China [2017YFA0604603] ; National Natural Science Foundation of China [31800400, 41630528] ; Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China [161016]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26781]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
2.East China Normal Univ, Sch Ecol & Environm Sci, State Key Lab Estuarine & Coastal Res, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China
3.East China Normal Univ, Res Ctr Global Change & Ecol Forecasting, Sch Ecol & Environm Sci, Shanghai, Peoples R China
4.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
5.China Agr Univ, Coll Grassland Sci & Technol, Dept Grassland Resource & Ecol, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Jian,Chen, Shiping,Yan, Liming,et al. A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2021,126(5).
APA Zhou, Jian.,Chen, Shiping.,Yan, Liming.,Wang, Jing.,Jiang, Ming.,...&Xia, Jianyang.(2021).A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,126(5).
MLA Zhou, Jian,et al."A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126.5(2021).

入库方式： OAI收割

来源：植物研究所

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